Answers can be displayed by clicking once on the questions link.1: How often should I replace my lens case?
The American Optometric Association recommends you replace your contact lens storage case at least every three months.1 Your contact lens solution manufacturer may recommend replacement at anywhere between one and three months of use.(2,3) Failure to replace the contact lens case at the recommended interval increases the risk of complications.(4,5,6)
Yes. Bacteria and other micro-organisms produce a substance called biofilm. Biofilms can form in a contact lens case, helping bacteria "hide" from the disinfectant in the contact lens solution.(1,2,3,4,5) Biofilm cannot be seen by the naked eye; therefore, it is best to replace your contact lens case at least every one to three months.
You should follow your solution manufacturer’s recommendations to clean and replace your lens storage case. Immediately after lenses are removed, discard the old solution from the wells of the case. The recommended steps from here may vary but usually include rinsing the case out with fresh solution and then air drying the case with the caps off.(1,2,3,4) Following these guidelines can reduce the chances of infection or inflammation.
Recent research also suggests that adding a rub and a wipe step can assist with biofilm and bacteria removal in lens cases.5 Immediately after lenses are removed, discard the old solution from the wells of the case. Rub the case with clean fingers for at least five seconds, rinse with the contact lens disinfecting solution, then wipe dry with a clean tissue.5 Air dry the case face down on a tissue with the caps off.4)
Avoid washing the case with tap water as this has been linked with an increased risk of development of Acanthamoeba keratitis, a severe corneal infection that can lead to permanent vision loss.6
Adding additional solution to a contact lens case containing used solution (known as "topping off") has been linked to serious eye infections and is associated with the development of contact lens-related complications.(1,2,3) To reduce this risk, recent research recommends contact lens wearers discard all used solution, rub the lens case with clean fingers for at least five seconds, rinse the case with a steady stream of contact lens disinfection solution, and then wipe the case wells dry with a clean tissue.4 Air dry the case face down on a tissue with the caps off.5
Avoid washing the case with tap water as this has been linked with increasing the risk of developing Acanthamoeba keratitis, a corneal infection that is resistant to treatment and cure.6
Contact lens cases are at greatest risk for becoming contaminated when stored in humid environments, such as bathrooms.1 Cases should also be stored away from toilets, which can generate contaminated spray droplets.2 A clean, low humidity area is best for storage of your lens case while your lenses are disinfecting.